Mission Specialists Christopher Cassidy and Tom Marshburn get hands on experience with the Pump Module Assembly.

At SPACEHAB in Titusville, Fla., STS-127 Mission Specialists Christopher Cassidy and Tom Marshburn (center) get hands-on experience with the Pump Module Assembly, part of the payload for the mission. At right is Mission Specialist Julie Payette (not in clean room garb). The crew members are at Kennedy for a crew equipment interface test, or CEIT, which provides experience handling tools, equipment and hardware they will use on the mission. The payload will be launched to the International Space Station aboard space shuttle Endeavour on the STS-127 mission, targeted for launch on May 15, 2009. Photo credit: NASA/Dimitrios Gerondidakis